Look under the sink and you'll see where the drain penetrates the floor. There is a plastic "shield" stapled to the floor. Typically the hole is cut about 3" in diameter, so there's plenty of space to pull that plastic shield and look at how the floor is constructed. On my 2014, there is a 3/8" OSB sheet under the vinyl, 2" of Styrofoam insulation and a 1/8" luan sheet on the bottom. As stated previously, the heat ducting runs through parts of that "sandwich structure" so there is some flexing along the heat duct.
You should be able to get a pretty good idea on how your floor is constructed by looking under the sink.
REMEMBER: the upper deck floor is not sandwich construction. On mine, it's a 5/8" plywood sheet with no insulation under the bathroom and most of the bedroom since the front storage compartment is under that area.
__________________
John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
|